MONOGRAPH OF THE LEUCOSIAD.E. 313 



Genus Nticia, Dana. 



" Carapax parce transversus, antice non productus, latere non dilatatus, inermis, superficie paulo tuber- 

 culatus, fronte bilobatus et non saliens. Oculi paulo remoti, grandiores, marginales. Area bucealis 

 bene triangulata. Maxillipedis externi articulus 3tius triangulatus ; palpus angustus, extus rectus. 

 Pedes toti breves, et crassi, digiti in piano subverticali claudente, eodem cum manus articulatione." 



Ntjcia speciosa, Dana, I. c. p. 397. t. 25. f. 5. 



It is unnecessary to quote the description of the only species upon which this genus is 

 founded. It appears to me that it is scarcely admissible into the family of Letjcosiad^e, 

 on account of the extraordinary size of the eyes, the thickness of the legs, and other 

 characters, no less than the general form and aspect of the body. I give this opinion 

 with deference in the absence of an actual specimen. 



EXPLANATION OP THE PLATES. 



Tab. XXX. 



Fig. 1. Leucosia orbicularis, a. side view of the carapace; 6. male abdomen; c. female abdomen. 



Fig. 2. Leucosia pallida, a. side view ; b. female abdomen. 



Fig. 3. Leucosia obscura. a. side view ; b. male abdomen ; c. female abdomen. 



Fig. 4. Leucosia marmorea. a. side view ; b. male abdomen. 



Fig. 5. Leucosia punctata, a. side view; b. anterior leg; c. male abdomen. 



Fig. 6. Leucosia affinis. a. side view; b. anterior leg; c. male abdomen; d. female abdomen. 



Fig. 7- Leucosia brevimana. a. side view ; b. female abdomen. 



Fig. 8. Leucosia margaritacea. a. side view ; b. anterior leg ; c. male abdomen. 



Tab. XXXI. 



Fig. 1. Leucosia ocellata. a. side view; b. anterior leg; c. female abdomen. 



Fig. 2. Leucosia Whitei. a. side view ; b. anterior leg ; c. female abdomen. 



Fig. 3. Leucosia Cumingii. a. side view; b. anterior leg; c. female abdomen. 



Fig. 4. Leucosia pulchella. a. side view ; b. anterior leg ; c. male abdomen ; d. female abdomen. 



Fig. 5. Leucosia phyllocheira. a. side view; b. anterior leg; c. posterior leg. 



Fig. 6. Persephona Lichtensteinii. a. side view. 



Fig. 7- Persephona orbicularis, a. female abdomen. 



Fig. 8. Persephona Edwardsii. a. female abdomen. 



Tab. XXXII. 



Fig. 1 . Leucosilia Jurinii. a. side view ; b. anterior leg ; c. foot-jaw ; d. male abdomen ; e. female 



abdomen. 

 Fig. 2. Myra affinis. a. side view ; b. male abdomen ; c. female abdomen. 

 Fig. 3. Myra carinata. a. male abdomen. 

 Fig. 4. Myra elegans. a. side view ; b. female abdomen. 

 Fig. 5. Myra mammillaris. a. male abdomen. 

 Fig. 6. Myrodes eudactylus. a. side view ; b. anterior leg ; c. foot-jaw ; d. male abdomen ; e. immature 



female abdomen. 

 Fig. 7> Philyra Icevis. a. side view ; b. male abdomen. 



